core/state/snapshot: fix journal recovery from generating old journal (#21775)

* core/state/snapshot: print warning if failed to resolve journal

* core/state/snapshot: fix snapshot recovery

When we meet the snapshot journal consisted with:
- disk layer generator with new-format
- diff layer journal with old-format

The base layer should be returned without error.
The broken diff layer can be reconstructed later
but we definitely don't want to reconstruct the
huge diff layer.

* core: add tests